Table 1 Specification of the MEP-e
| Parameter | Value | Notes |
|---|---|---|
| Energy range | 7–87 keV | |
| Energy resolution | 8% | FWHM of the electrostatic analyzer response |
| Energy steps | 16 steps per scan | |
| Sensor field of view |
360°(azimuth) × 3.5°(elevation) ~ 3.5°(azimuth) × 3.5°(elevation) per detector |
Azimuthal gaps exist between detectors FWHM |
| Number of APDs | 16 | Circularly aligned |
| Geometric factor | 6.6 × 10−5 cm2 sr keV/keV per detector | APD efficiency not included |
| Time resolution |
4 s for the 3-D distribution function 250 ms for one energy scan 15.6 ms for one energy step ~ 1.5 μs for the S-WPIA data | For nominal spacecraft spin (8 s) |
| Sensor size | ϕ318 mm × 395 mm | Including PSU/CPU |
| Sensor mass | 8.2 kg | |
| Power consumption | 21 W | Including DC/DC converter efficiency |
| Data rate | 1.756 kB per one energy scan |